Perhaps you should try some spelling variations:
"element mapping algorithm" » "element sampling algorithm" (Expand Search), "element matching algorithm" (Expand Search), "element mining algorithm" (Expand Search), "elemental mapping algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"element tree algorithms" » "element three algorithms" (Expand Search), "element other algorithms" (Expand Search), "element art algorithms" (Expand Search), "element ree algorithms" (Expand Search), "element te algorithms" (Expand Search), "elements ree algorithms" (Expand Search)
"elements zinc algorithm" » "elements ii algorithm" (Expand Search), "elements cnn algorithm" (Expand Search), "elements iii algorithm" (Expand Search), "elemental zinc algorithm" (Expand Search), "elements zr algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("elements zinc algorithm") OR ("element tree algorithms"))) OR ("element mapping algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"elements zinc algorithm\") OR (\"element tree algorithms\"))) OR (\"element mapping algorithm\"))".
• Removing quotes may allow a broader search: (((( elements zinc algorithm ) OR ( element tree algorithms ))) OR ( element mapping algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("elements zinc algorithm") OR ("element tree algorithms"))) OR ("element mapping algorithm"))*.